DOC Update README.md for CMS 5

README.md

@@ -7,14 +7,10 @@ Provides simple email notifications for when new visitor comments are posted.
 
 ## Installation
 
-Install using Composer:
-
-```
-composer require silverstripe/comment-notifications ^2.0
+```sh
+composer require silverstripe/comment-notifications
 ```
 
-**Note:** This branch is Silverstripe 4 compatible. For a Silverstripe 3 version please see the [1.x release line](https://github.com/silverstripe/comment-notifications/tree/1.0).
-
 ## Configuration
 
 To configure the default email address to receive notifications, place this in your `mysite/_config.yml`